ADR American Depositary Receipts,were issued by American Depositary Bank to American investors,which represent,a sort of circulative stocks owned by non American companies.

The authors point out that,in the industry of security communication network,because of the trait of Network effect in securities communication network,the competition of technology standard usually result in the market structure of "winner-take-all",if the enterprise adopts rational and effective competition strategy will play an important role.